Automatic spraying device for preparing fuel cell membrane electrode

Abstract

The invention relates to an automatic spraying device for preparing a fuel cell catalytic membrane electrode, which comprises a workbench and a spray gun, wherein the workbench is a vacuumized heating bench which is a hollow box body internally provided with an electric heating element, the box body is connected with a vacuumizing system through a pipeline, and the upper surface of the box body is shaped as a flat plate and is provided with a hole capable of leading to an cavity of the box body; the spray gun is connected with a spraying machine liquid storage hopper through a pipeline, and an ultrasonic oscillator is arranged on the bottom or side wall of the hopper; and a nozzle of the spray gun is provided with an umbrella-shaped heating cover. The vacuumized heating bench for carryinga membrane material can be used for accelerating the solvent volatilization and avoiding the membrane swelling and deformation. A catalyst feed solution is in an ultrasonic oscillating environment during the spraying so as to ensure the uniformity. Through heating a fan-shaped environment between the gun opening of the spray gun and the membrane material, the volatilization of the solvent during the spraying of the feed solution can be improved. The spraying thickness can be determined through controlling the concentration, the spraying flow and the spraying times of the feed solution. Compared with the traditional manual spraying device for preparing the membrane electrode, the automatic spraying device has the advantages of improving the spraying efficiency, ensuring the spraying uniformity and the experimental repeatability, and correspondingly solving the problems of membrane swelling, slurry settlement due to long-time placement and the like in the direct spraying method for preparing the membrane electrode by introducing elements, such as the vacuumized heating bench, the ultrasonic oscillator and the like.

Description

technical field [0001] The invention relates to the preparation of membrane electrodes of proton exchange membrane fuel cells, in particular to an automatic spraying device for the preparation of catalytic membrane electrodes of proton exchange membrane fuel cells, which effectively improves the spraying efficiency and uniformity, and adopts vacuum heat at the same time The platform, ultrasonic vibration and spraying environment heating hood effectively improve the swelling and deformation of the membrane when the catalytic membrane electrode is prepared by the direct spraying method, and accelerate the solvent volatilization. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that uses hydrogen as fuel and can effectively convert its chemical energy into electrical energy. Its high energy density, fast start-up speed, low operating temperature, and environmental friendliness determine its It is very suitable as a power source for e...

AI Technical Summary

Problems solved by technology

For the problems encountered in the preparation of catalytic membrane electrodes by direct spraying method (mem

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